This Specimen has been sold.
2.5" Partial Isoteloides - Fillmore Formation, Utah
This is a partial, unprepared Isoteloides trilobite from the Carolinites nevadensis Zone in the Fillmore Formation in Utah. The partial is 2.5" long but missing it's head or it would have been close to 4" long. It appears very similar to the Isoteloides flexus found significantly higher in the formation, but pretty much every species in this zone has been described as different species, so I suspect this one would be to.